NSS on RHEL7

Due to the serious issues with the design of TLS and implementation issues in nss uncovered during the lifetime of RHEL7 you should always use the latest version but at least

nss-3.36.0-7.1.el7_6

Note that the RHEL7 version of NSS currently differs from those on RHEL6 and RHEL5 despite being the same sources. On RHEL7 the SSL2 protocol along with the SSL2 ciphers are disabled and cannot be enabled.

Capabilities

Protocols

TLSv1.2

TLSv1.1

TLSv1

SSLv3

Cipher Suites

In all current versions of NSS there is no centralised mechanism to provide a preferred cipher list. The result of this is that all applications that utilise NSS for their cipher needs provide their own cipher string parsers. This known shortcoming is something that is looking to be addressed in future releases of NSS.

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